Warp stop-motion for looms.



G. KOCH. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED AUG. 15, 1911.

' Patented Dec. 10, 1912.

2 SHEETS-SHEET 1.

E' TL fiii zewae ts-x- A G. KOCH.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED 11136.15, 911.

047 0 0 r Y Patented Dec. 10,1912.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFF-ICE.

GEORGE KOCH, OF SHELTON, CONNECTICUT, ASS IGN OR TO SIDNEY IBLC'MENTHAL &

COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

' wARr STOP-MOTION,FOR LOOMS.

Specification of Letters Patent.

Patented Dec. 10,1912.

Application filed August 15, 1911. Serial No. 644,199.

dent of Shelton, in the county of F airfield and State of Connecticut, "have invented a new and useful Improvement in Warp Stop-Motions for Looms, ofwhich the following is a specification.

My invention relates to a war stop motion for looms, with the object in View of providing effective means for stopping the action of the loom when for any cause a warp thread breaks.

My present invention is illustrated in connectlon with what is known as the Tonnar loom for weaving a double pile fabric, but I do not wish to limit it to this particular type of loom, as it may be successfully employed in connection with looms of vanous well known types.

In the accompanying drawings, Figure 1 is a View in sideelevatlon, partly in section, of so much of a loom as will serve to show the practical application of my invention.

Fig. 2 is an enlarged partial plan view of.

the same. Fig. 3 is an enlarged partial vertical section of the same. Fig. 4 is an enlarged plan View in detail of the tripping mechanism. Fig. 5 is a view of the same in elevation, partly in section, and Figs. 6, 7 and 8 illustrate in side elevation, modified forms of the cont-act pieces for completing the electric circuit.

The loom frame is denoted by 1, the gang,

of heddles by 2, the warp beams by 3 and 4', the lay beam by 5, the control lever by 6, the rocking lever for efiecting the stopping of the machine, by 6*, the cam for operating said lever by 7, the hook on one arm of said lever by 8, and the rocking weft stop fingers by 9. These parts so referred to, may be of any well known or approved form, such, for example, as shown inthe Tonnar Patent No. 716352 dated December 16, 1902.

For applying my present inventionin a practical manner, uprights 10 and 11 are fixed to a suitable horizontal support 12 and are provided witlp'U-shaped brackets 13, 14, secured to the respective uprights at the middle portion of their bight, one arm of each of the said brackets being projected downwardly farther than the other arm. The arms of these brackets 13, 14, are each provided with elongated slots, those in the shorter arms being denoted by 15, 16, and those in the longer arms being denoted by 17, 18. Horizontal boxes 19, 20, extending the width of the loom between the brackets 13, 14, are fitted at their ends, the one to rise and fall to a limited extent within the slots 15, 16, and the other within the slots 17, 18. These boxesare suspended at their opposite ends from hangers 21, 22, connected by a band 23 passing over a pulley 24 arranged to be rocked at the proper time with respect to the rocking of the heddles to maintain the proper tension upon the warp threads 25, 26. In the present instance, this is accomplished by means of .a belt 27 leadingfrom a pulley 28 on the shaft 29 which rocks the heddles, to a pulley 30 suitably supported from the top frame of the loom and connected by a belt- 31 with the shaft which carries the pulleys 24. It is to beunderstood that a pair of hangers similar to 21, 22, is employed to suspend the opposite ends of the boxes 19, 20.

Within each of the boxes 19, 20, there are 7 provided on a rod 32 in the box 19 and on a rod 33 in the box 20, a series of contact through the top of the box, .with an eye 35 through which a warp thread leading over the top of the box, asses, as it leads from the warp beam to t e heddles. Along the lower portion of the box, there is fixed a rod 36, insulated from the box by suitable insulation 37, the'rod 36 being in position to contact with the toe of any one of the contact pieces 34 when the latter. is allowed to tilt into an abnormal lposition, shown clearl in Fig. 3, by the brea mg of a warp threa As long as the warp thread remains intact, the contact piece 34 will be held by the warp thread in a position sufiiciently upright, as clearly shown in Fig. 3, to carry its toe out of contact with the rod 36.

The rod 36 is electrically connected, for

example, by'a wire 38, see Fig. 2, with one pole of a battery 39. The opposite pole of the battery is connected by a wire40 with one pole of an electro-magnet 41, the opposite pole of the electro-magnet being connected with some part of the machine which is in electrical contact with the part of the machine which is electrically connected with the rod 32 on which the contact pieces 34 are pivoted.

The rod 36 connected with the box 19, is electrically connected by a wire 42 with the corresponding insulated rod on the box 20, and thence by the wire 38 to the battery, and the boxes 19 and 20 may be electrically connected as by a wire'43, so that the rods- 32 and 33 may be in electrical contact and the connectionof either or both of them with some part of the machine by which the current may be carried to the pole of the electro-magnet 41, will complete the circuit when the contact piece 34 is tilted into position to connect the rod 32 or 33 with the insulated rod 36 on the box 19 or its corresponding rod on the box 20.

The armature 44 of the electro-magnet 41 is on one arm of a lever pivoted at 45,

the opposite arm of the lever being provided with an abutment 46 which rests against the upper arm 47 of a weighted-leverpivoted at 48. The said arm 47 of the weighted lever is provided'with a projection 49 connected with a link 50, attached to a pull rod .or cord 51, extending upwardly and connected with the end of a pawl 52, see Fig. 5. The pawl 52 is pivoted on a pintle '53, the latter supported on a bar 54 eld in a bracket arm 55, which in turn is secured on a horizontal rocking arm 56, pivoted at 56* to a bar on the main frame The bar on the main frame is provided with an elongated slot 57, and an ofiset notch 58 in which the control lever 6, which projects upwardly through the slot 57, is held to hold the loom in action. When the arm 5.6- is swung horizontally to force the control lever out of its retaining notch 58, into the slot 57 anactuating spring, not shown, on the control lever will throw it along the slot 57 into position to throw the loonrout of action.

forth toward and away from the heddles during the operation of the loom. When, however, the pawl 52 is forcibly tilted down into the position shown in dotted lines in Fig. 5, the rolling weight 59, will pass .to

the opposite end of the tube 60 and hold the said pawl down in position to engage the hook 8. When the hook 8 catches the pawl .52, it will'carry the pawl and the pivotal support of the pawl, as well as the bar 54 and its support, bodily to the right as the drawing is held, thereby torcing the control lever 6 out of the notch 58 and allowing it to travel along the-slot 57 under the action of its spring to throw the loom out threads are concerned, but when for any cause a warp thread breaks, its contact piece will promptly tilt into engagement with the rod 36 or its corresponding rod on the box 20, 'thereby closing circuit through the electro-magnet 41, and by the series of operations already fully described, the con trol lever 6'will be promptly thrown into position to throw the loom out of action.

The contact pieces 34 may assume various forms other than that shown in Figs. 1 to 5 inclusive; for example, as shown in Fig. 6 the eye, denoted by61, may be 0 on or as shown in Fig. 7, the eye, denoted y'62, may be open, and also the hole throu h whlch the pivot rod 32 extends may e open, or as shown in Fig. 8, the eye maybe closed and the hole through which the rod 32 extends open, as shownat 63.

What I claim is: .1. In a stop motion for, looms, a lurality' of boxes mounted to rise and all and adapted to receive the warp threads on their upper sides, means for alternately raising and lowering the boxes, a series of contact pieces pivoted in each of the boxes, one contact piece for each warp thread, and each having an eye portion which projects through the upper side of the box to receive a war thread, rods insulated from and carried lby the boxes in position to be engaged by the contact pieces when the lat ter are free to tilt, the warpthreads being arranged when intact to hold the contact pieces out of contact withthe insulated rods, an electric circuit including the said insulated rods, contact pieces and an electromagnet, a loom control lever and means under the control of the electromagnet for throwing the control lever in position to stop the loom when the electromagnet is energized. 2."In a warp stop motion for looms, an electric circuit including an electro-magnet, means under the control of the warp threads for. energizing the magnet when a warp thread breaks, a reciprocating hook, a awl in position to engage the hook, a shi ing weight for holding the pawl in and out of engagement with the hook, means under the control of the electro-magnet for operat- -engagement with the hook.

3. In a warp stop motion for looms, a rocking pawl, a shifting weight'tor holding the pawl in diiferent tilted adjustments,

means under the control of the warp threads In testimony, thait I claim the foregoing 'for tilting the pawl, a reciprocatmg hook as my invention, I have s'ignedmy name in 10 arranged to cooperate with the pawl, a presence of two witnesses, this 11th day of loom control lever and mechanism lnterme- August, 1911.

5 diate of the tilting pawl and control lever I GEORGE KOCH.

for-throwing the control lever into position Witnesses: to stop the loom when the pawl is engaged EowARD W. KNEEN, by the hook. F. STOLZENBERG. 

